A $500 Bill is a 500 Dollar Paper note that appears in the Episode: Penny Foolish. SpongeBob found it outside the window of the Discount Grocery Mart, and Mr. Krabs thought it was a Penny, but when SpongeBob found it he thought it was a chewed up Gum for his Collection. It is unknown what has happened to it.
- On the dollar bill, it says "Bux" instead of bucks. And anyway, bucks would be bad grammar.
- On the top it says "Fraudral Reserves", meaning it's fake.